Valve



' March 19, 192 9. J C MOODY I 1,705,942

VALVE Filed Feb. 4, 1928 INVENTOR.

Fit. E 4 Ju/l'us CMOOdy PM 4? W01 A TTORNE Y.

Patented Mar. 19, 1929.

UNITED STATES I 1,705,942 PATENT oFFicE.

JULIUS C. MOODY, OF FRANKLIN, PENNSYLVANIA, ASSIGNOB. TO CHICAGO PNEU-MATIC TOOL COMPANY, OF NEW YORK,

N. Y., A CORPORATION OF NEW JERSEY..

VALVE.

Application filed February This invention relates to valve devices ofthe type used in pumps, .compressors and similar machines and moreparticularly to valve assemblies adapted to be inserted as a unit. Morespecifically it concerns units of the described type in which the valveproper is of the wafer or plate type, and is in the nature of animproved valve unit such as disc-losedin copending application SerialNo. 164,148, filed January 28, 1927.

One object of the invention is to provide a simplified form of valvewhich is cheaper and easier to manufacture as well as more durable inservice. Another object is to secure a freer and less obstructedmovement of fluid through the valve when open. Other objects will beapparent from the detailed description which follows.

In order to illustrate the invention one concrete embodiment thereof isshown'in the accompanying drawings in which:

Fig. 1 is a vertical sectional view through a portion of a machine ofthe described type showing a valve assembly embodying the inventionmounted in a valve chamber of the machine, the assembly being in sectionsub stantially on the line 11 of 2: and

Fig. 2 is a sectional view substantially on the line 2 2 of Fig. 1. 1

In Fig. 1 a fragmentary portion of the cylinder 3 of a pump, compressoror other engine is shown. The inner and outer walls of the cylinderprovide therebetween chambers 4 for the water of the cooling system.

The walls have aligned perforations at 5 and 6 o enin into a valvechamber 7 erfora-' tion 6 in the 'outcrwall being the larger to permitthe insertion and removalof a valve unit or assembly A. The unit closesthe per foration 5 in the inner wall of the cylinder and a closure inthe form ofa cap 8 is pro-- vided for perforation 6 in the outer wall,the closure being held in place by any suitable means, such as capscrews 9. A gasket 10 may be placed under cap 8 tov produce a tightseal. Between closure 8 and valve assembly A suitable means are providedfor maintaining the valve assembly in tight engagement with the innerwall of a compressor. In the present instance a heavy coil spring 11 isprovided for this purpose.

Valve assembly A comprises a seat member 14:, a keeper member 15, avalve proper 16 of the annular plate or disk type, a valve spring 17 abuffer spring 18, and a stud 19 4, .1928. Serial N0. 251,809.

with its castle nut 20 and cotter pin 21 for maintaining the aforesaidelements in assembled relation. The head of stud 19 seats in a centralopening in seat member 14,6181- tends through an axial borein keeper 15,and its nut 20 engages the outer portion of keeper 15, as indicated.Seat member 14 is circular inform having a portion telescoping withinigerforation 5 of the cylinder wall and an annular projecting flange 14which. engages the cylinder wall. Seat member 14 has an annularportion14" projecting above the plane of flange 14? to provide the seat forplate valve 16 and has a series of openldicontrolled by valve 16.Keeper15 has a reduced lower end fitting in a central depression in seatmember 14. Portions of keeper member 15 are cut away axially atintervals circuinferentially thereof as indicated at 15" to facilitatethe passage of fluid when valve 16 is opened, the uncut portions servingas guides for valve 16 in its move ment toward and away from its seat.The portion of keeper 15 remote from seat member 14 is enlarged by aseries of stepped annular projections 15" and 15, which provideshoulders engaged by springsl'i and- 18 respectively. As shown springs17 and 18 are nested a'ndfencircle keeper 15, spring 17 bemg nterp-osedbetween valve 16'and the arrangement for securing buiier spring 18 v tothe keeper is to have theupper portion of the spring engage projection15'with a press fit- For this purpose the peripheral wall of projection15 may incline inwardly to a slight extent, as sh0wn',;as it approachesthe shoulder formed by projection 15.

Valve assembly A is designed and intended to provide as littleobstruction as possible to the movement of the fluid controlled thereby.To this end all portions of the assembly 7 above iiangel t of the seatmember are wholly within a projection of that portion of the seat memberwhich telescopes withinthe cyl-. inder opening. Hence, when plate valve16 lifts to uncover openings 1 1 the fluid can pass outwardly withoutbeing obstructed in CPI any manner by any portion of either seat member14 or keeper member 15. Any portion of the fluid which passes inwardlytoward the keeper member passes through the cut away openings 15 and outbetween the coils of springs 17 and 18.

While a preferred form of the invention has been herein shown anddescribed, it is to be understood that the invention is not limited tothe specific details thereof, but covers all changes, modifications, andadaptations within the scope of the appended claims.

I claim as my invention:

l. A valve unitor assembly comprising a seat member, a plate valvearranged to lit the seat on said member, a keeper member engaging saidseat member and forming a guide tor said valve, an annular projectionupon said keeper member providing a shoulder above said valve, a springinterposed between said shoulder and said valve for yieldinglymaintaining the latter on its seat, a second annular projectionabove'and beyond said first projection, and a butler spring beneath saidsecond projection and secured to said first projection, the tree end ofsaid butler spring being normally out of contact with said valve.

2. A valve unit or assembly comprising a seat member, a plate valvearranged to lit the seat on said member, a keeper member engaging saidseat member and forming a guide lior said valve, said keeper memberhaving stepped projections above and overhanging said valve, and nestedsprings encircling said keeper member and engagin said respectivestepped projections, one of said springs being in engagement with saidvalve yieldingly to maintain it upon its seat while the other spring isnormally disposed out of contact with said valve.

A valve unit or assembly comprising a member arranged to lit within anopening in the cylinder wall of a pump or compressor and having a flangeto engage said wall, said member providing an annular valve seat andhaving no portion extending above said seat, a plate valve on said seat,a keeper member engaging said seat member within said seat only andproviding an annularly spaced series of guide projections formaintaining said valve centered relative to its seat during its movementfrom and back to said seat, stepped annular projections on said keepermember beyond said guide projections, and nested valve and buttersprings engaging said projections.

l. A valve unit or assembly comprising a member arranged to iit withinan opening in the cylinder wall of a pump or compressor and having aflange to engage said wall, said member providing an annular valve seaton the uppermost portion thereof, a plate valve on said seat, a keepermember engaging said seat member within said seat and providing anannularly spaced series of guide pr0jections for maintaining said valvecentered relative to its seat during its movement from and back to saidseat, stepped annular projections on said keeper member remote from saidvalve but overhanging the latter, and nested valve and butler springsengaging said last named projections, the butter spring being secured toone of said last named projections and having a free end normally outof. contact with said valve but arranged to cushion the opening movementof the latter.

5. A .valve unit or assembly for pumps,

compressors and the like comprising a seat member having a portionarranged to fit within he pump or cylinder opening, a plate valvearranged to lit the seat on said member, a keeper engaging said seatmember and "forming a guide for said valve, a plurality of resilientmembers operable independently for yieldingly maintaining said valve onits seat and for cushioning its movement, and means "for maintainingsaid parts in assembled relation, all portions of said unit above saidvalve seat being Within a projection of said portion of said seat memberto provide free and unrestricted movement of the fluid controlled bysaid unit,

6. A keeper member for valve units or assemblies utilizing an annularplate valve, said member having a reduced end to form a central guidefor the valve, said end being cut away at intervals to permit treemovement of the fluid controlled by the valve, said member beingenlarged beyond its reduced end by a series of stepped annularprojections providing abutment seats for a series of nested springs forthe valvefi Signed by me at Franklin, county of Venango, State ofPennsylvania, this 1st dayot February, 1928.

, JULIUS C. MQODY.

